If you email the lady at Gamrie goat (google it), she would probably advise you, as she is running a one (wo)-man business with her soap and has got all the H&S stuff done. Not sure if its different in Scotland though, but wouldn't think so.
Would be intersted to know how it goes, I WILL make my own soap (as soon as .... the garden slows down, the pigs are gone, etc etc etc)
Anke